共查询到19条相似文献,搜索用时 78 毫秒
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介绍了国内外研发微藻生物柴油的动态,预见用工业装置生产微藻生物柴油的技术近几年内将取得重大突破,微藻生物柴油产业将成为一个新兴的替代能源产业.我国微藻生物柴油产业化研究和国际水平基本同步,是一个全新的自主创新领域,提出应抓住微藻生物柴油产业的发展机遇.对工业化生产微藻生物柴油的光生物反应器设计技术、微藻培养控制系统、配... 相似文献
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采用生活废水的二级出水培养微藻可有效提高微藻生物柴油生产过程的环境效益,降低其环境影响。本文基于生命周期分析原理,针对结合了废水培养微藻的两种微藻生物柴油生产技术路线,即传统路线和热解酯化路线,建立了环境影响评价模型;提出了水处理集成微藻生物柴油生命周期系统评价的水处理过程替代效应的概念及其环境效益定量评价方法;通过计算对比了基于新鲜水培养微藻的两种技术路线的总环境影响指数和废水培养微藻的两种技术路线的环境效益,表明热解酯化工艺结合废水培养微藻路线相较其他工艺路线具有最小的环境影响,表明水处理过程替代效应在水处理集成微藻生物柴油生命周期系统评价中的有效性和必要性。 相似文献
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微藻制备生物柴油的技术进展 总被引:1,自引:0,他引:1
生物柴油是一种新型的可再生能源,是石化柴油的替代品。微藻种类多、光合作用效率高、生长速度快、生物产量大、含油量高,已成为发展生物柴油产业的最有潜力的原料之一。综述了微藻制备生物柴油的优点及研究进展。针对目前微藻生物柴油存在的瓶颈问题和实际需求,指出未来研究和发展的主要方向。 相似文献
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藻类生物燃料从原料的培育,制备工艺,到产品,每个环节都与环保有着密不可分的关系。通过对藻类生长环境、人工微藻的污水培育、微藻生产生物柴油的规模化培养、采收、干燥、提取油脂、制备方法等无污染先进技术的介绍,指出微藻生物燃料的发展不但更利于缓解温室效应,处理环境污水,而且其生产工艺的绿色化,让微藻生物燃料的发展前景更广阔。 相似文献
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Xin Bei Tan Man Kee Lam Yoshimitsu Uemura Jun Wei Lim Chung Yiin Wong Keat Teong Lee 《中国化学工程学报》2018,26(1):17-30
Fluctuating market price of fossil fuel and overwhelming emission of greenhouse gases to the atmosphere have resulted in climate change and have been a global concern in this decade.Hence,biodiesel has become an alternative option to fossil diesel as it is renewable and environmentally friendly.Nevertheless,this alternative fuel that is usually derived from terrestrial oil crops will cause shortage in food supply and deforestation if mass production is realized.In recent years,cultivation of aquatic microorganism (particularly microalgae) to produce biodiesel is considered as a practical solution due to their high growth rate and ability to synthesize large quantity of lipid within their cell.However,the development of energy and cost-efficiency of microalgae cultivation system are the main issues in producing renewable microalgae biodiesel.Of late,wastewater or organic compost has been used as the cultivation medium as it can provide sufficient nutrients to sustain microalgae growth.Microalgae cultivation method and system are vitally important as these factors undoubtedly affect the final microalgae biomass and lipid yield.In this review,the cultivation system of microalgae,nutrients demanded for microalgae production,cell harvesting and drying,microalgae oil extraction,and utilization of microalgae biomass for biodiesel production are introduced and discussed.It is anticipated to convey clearer perspectives in upstream and downstream processes in microalgae-derived biodiesel production. 相似文献
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以微藻毛油为原料,采用近临界醇解(SRCA)工艺制备微藻生物柴油,并分析了微藻生物柴油的各项指标。分析结果表明:微藻生物柴油的密度、运动黏度、闪点、含硫量、硫酸盐灰分、含水量、机械杂质、铜片腐蚀、十六烷值、酸值、游离甘油和总甘油等12项指标符合GB/T 20828-2007对调和用生物柴油BD100的要求;10%蒸余物残炭(4.03%)、氧化安定性(0.85 h,110℃)以及90%回收温度等3项指标与国标要求存在一定的差距;冷滤点(34℃)指标也不满足实际使用要求。通过结晶过滤或馏分切割可以降低产品的冷滤点;通过馏分切割可以获得90%回收温度达标的生物柴油组分(180℃以下馏分);通过添加2 000 μg/g抗氧剂,可以使氧化安定性提高到9.50 h,从而达到国标要求。 相似文献
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利用有机溶剂提取微藻油脂的方法探究 总被引:1,自引:0,他引:1
在传统化石能源日益枯竭的趋势下,微藻生物柴油作为第三代绿色可再生的替代型能源越来越受到人们的重视.在微藻生物柴油的产业链上,油脂的提取是影响其推广应用的一个关键环节.本文实验利用有机溶剂提取微藻油脂,探究在不同的条件下微藻油脂的提取效果,并特别研究了先后使用甲醇和石油醚两种有机溶剂对微藻油脂提取率的影响.研究结果表明:温度、液料比、浸提时间对提取效率都有一定的影响,并且使用甲醇和石油醚两种溶剂分步提取时会使微藻油脂提取率明显提高;在液料比为15mL/g、提取温度为45℃、提取时间为5h时,使用石油醚作为提取剂的提取率为58.71%;使用甲醇溶剂提取后再使用石油醚提取时,在液料比和提取时间相同的条件下,温度为35℃时提取率即可达87.90% 相似文献
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Yun Cheng Wenguang Zhou Chunfang Gao Kenneth Lan Yang Gao Qingyu Wu 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2009,84(5):777-781
BACKGROUND: As a potential source of biomass, Jerusalem artichoke has been studied for bioethanol production; however, thus far it has not been investigated for the production of other liquid biofuels, such as biodiesel. This work aims to develop a novel approach for biodiesel production from Jerusalem artichoke tuber using heterotrophic microalgae. RESULTS: In this study, Chlorella protothecoides utilized hydrolysate of Jerusalem artichoke tuber as carbon source and accumulated lipid in vivo, with lipid content as high as 44% by dry mass, and a carbon source to lipid conversion ratio of about 25% in a 4‐day scale cultivation. The lipids were extracted and then converted into biodiesel by transesterification. Cetane acid methyl ester, linoleic acid methyl ester and oleic acid methyl ester were the dominating components of the biodiesel produced. Unsaturated fatty acids methyl ester constituted over 82% of the total biodiesel content. CONCLUSION: This work suggests the feasibility of an alternative method of producing biodiesel from Jerusalem artichoke tuber using microalgae cultivation, and a cost reduction of carbon source feed in algal oil production can be expected. Copyright © 2009 Society of Chemical Industry 相似文献
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Yan Wang Tao Chen Song Qin 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2013,88(4):651-657
BACKGROUND: Integration of oleaginous microalgae cultivation with wastewater treatment is considered a low‐cost approach for manufacturing algae‐based biodiesel. However, autotrophic microalgae cannot survive in organic wastewater where the effluent is usually turbid and sunlight cannot penetrate into the wastewater. Thus mixotrophic microalgae should be explored. The objective of this study was to investigate the potential of using mixotrophic Chlorella kessleri to produce fatty acids from organic materials. RESULTS: Results revealed that mixotrophic C. kessleri fatty acids display much greater productions (up to 54.67% of cell dry weight) and more suitable compositions for biodiesel production (moderate carbon chain length mainly with C16 and C18, down to 1.17 ?/mol of unsaturation degree) than autotrophic ones. A suitable final pH (near neutral) after nitrate‐depletion and a high organic carbon consumption seemed to be the key factors manipulating fatty acids production under whichever organic substrate tested. CONCLUSION: These characteristics increase the acceptability in using mixotrophic C. kessleri as a potential easy‐control candidate in biodiesel production. If fed with available organic effluent of wastewater as the nutrient supply, C. kessleri may have great potential for profitable biodiesel. © 2012 Society of Chemical Industry 相似文献
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